First the electric motor can burn out rendering the unit non responsive so nothing changes when the temperature or.
Dorman a c heater blend door actuator.
A blend door actuator is made up of an electric motor that turns a plastic gear set in one direction or another which is connected to an air control door pivot at the final drive of the unit.
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In this video i explain how to replace the a c blend door actuator.
Air door actuator replaces 89018365 604 106 52402588 compatible with chevrolet chevy gmc 1994 2012 silverado 1500 and 2500 tahoe sierra hvac blend control actuator heater blend door 4 5 out of 5 stars 836.
Parts are just part of what we do.
Dorman 604 121 air door actuator was bought and installed to replace the gm oem part 54202599 which appeared to have stopped functioning correctly after 13 years of use in a gm canada 2006 yukon with rear climate a c.
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Dorman a c heater blend door actuator 604 029.
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Hvac air door actuator blend application summary.
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Problem being encountered included rear climate control staying on cold despite adjusting the temperature controls for the rear passenger heat and a c.
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Dorman dorman a c heater blend door actuator 604 120.
Air inlet air door actuator vacuum style application summary.
And what causes them to mess up.
Air door actuator replaces 15 73952 52495593 89018374 604 112 compatible with chevy gmc cadillac hummer 2003 2014 models hvac blend control actuator air heater blend door 4 6 out of 5 stars 350.
An actuator can go bad in of two ways.
Buick 1999 91 cadillac 2002 91 chevrolet 2016 96 gmc 2016 96 oldsmobile 1999 91 pontiac 1999 92 application attributes.
You could have a non working a c heater blend door actuator.